Magazine-hammer.



1. B. CROFOOT.

MAGAZINE HAMMER.

APPLICATION FILED JUNE I3. I9I6.

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Patented Apr. 24,191?.

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.roma B. caoroo'r', or cnrcaeo, rumors.

MAGAZINE-HAMMER..

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speeication of Letters-Patent. Patemtfd Apr. 241, 119117.,

Application led June 13, 1916. Serial No. 103,537.

-use the same, reference being had to the accompanying drawings, and to the letters and.

figures of reference marked thereon, which form a part of this specification.

This invention relates to new and useful improvements in magazine hammers, especially designed for staple work in which a strip of staples is automatically fed forward at each stroke of the hammer, causing a staple to be severed and driven by the blow of the hammer. x

The invention consists of various other details of construction, combinations and arent instance is shown as havin rangements of parts which will be hereinafter fully described,.shown in the accompanying drawings and then specifically defined in the appended claims. l

My invention is illustrated in the accompanying drawings, in which Figure 1 is a central vertical view through a, magazine hammer embodying the features of my invention.

Fig. 2 is a sectional view on line 2--2 of eference now being had to the details of the drawings by letter, A designates the body portion ofthe tool which has a detachab e hollow handle which in the presthreaded connection with the body portlon. Said body portion is provided'with a guideway C adapted to have a play. A plunger F is secured to the momentum cap and its inner edge is notched as at H, adapted to receive the pawl I, which is normally held at its outer limit through the medium of the spring K, mounted in' a recess in the body portion of the device. A coiled spring 0 is mounted about the plunger and rests Vone end against the shoulder J and its other end is fastened to the momentum cap, said spring being of a strength just suicient to support the momentum head in normal position and to yield when a blow` is struck upon swinging 1n which a guide lmember D, which is fas- `tened to the momentum head or cap I3, is

. the hammer is in readiness for use.

the hammer in the usual manner, thereby' causing a staple to be severed from the staple strip and be driven into an object. R designates a staple strip of well known construction which is mounted in the handle portion ofthe device and passes through an opening B therein, a suitable guide N being fastened to the handle and engaging the staple strip.

A shearing block lor knife, designated by letter T, is mounted in a recess in the lower part of the body portion and over which the staple strip moves, said'block having shoulders T, as shown in the sectional view of the drawings. A dog Q is pivotally mounted upon the pawl I and has a bifurcated end designed to engage the -staple strip in the manner shown in the drawings and at each forward movement of the pawl I the staple strip will be fed forward a sufficient disy tance to' expose a single staple in advance of the cutting block T and in the path of the plunger which, when a blow is imparted to the momentum head or cap, is adaptedto sever the staple and drive the same into any Object against which the device is held. A

spring-pressed dog M is pivotally mounted upon a lpin M within the recess of the body portion and is designed to rest'upon the upper edge of the block 'I and guide the staple strip and prevent a reverse or rearward movement to the same.

f It will be noted uponfreference to Fig. 1 of the drawings that the under edge of the body portion has a slightly conveXed pro jecting part A which serves as avcontact surface which is adapted, under swinging movement of the hammer, to be brought against the article into which the staple is to be driven.

rIhe operation of my invention will be readily understood and is as follows When the parts are adjusted as shown in l Fig. 1 and the staple strip adjusted in place, When the contact projection A is brought forcibly against the object into which it is desired to drive the. staple, as b y swinging the hammer, the momentum given to the hammer during its swinging movement and the sudden stopping of the movement of the hammer when coming into contact with an object will impart a downward movement to the momentum cap or head and carry with it the plunger. As the free end of the plunger comes in contact with the projecting portion of the staple strip, a staple will be severed by the shearing action of the face of the plunger with the block upon which the staples are held and a fur- 5 ther downward longitudinal movement of the plunger will drive the staple into the f object below. After the momentum blow has been imparted to the staple, the spring bearing against the momentum cap yor head will return the same to its normal position. It will be noted that, when the plunger is driven downward, 'the curved edge of the notch I-I coming in contact with the curved end of the pawl will move the latter rear-4 ward out of its path and against the tension of the spring K. This movement of fthe pawl carries the dog Q, with it, which latter will engage the neXt staple to be severed and move it to proper position` on the.

return movement of the said dog and pawl to the position shown in Fig. l of they drawings.

It will thus be noted that the operation of my invention is automatic, at each blow of the hammer a staple being severed and driven by the plun er.

What I claimto e new is l. In a magazine stapling hammer, a

body having a shouldered portion, a chambered momentum head slidably mounted on said body, a reciprocating staple setting lplunger connected to said head andA provided with a notch in one edge thereof, a

bar operating at right angles to said plunger and having a shouldered end coperating with the notch in the plunger to restrict the movement of the plunger in one direction, a spring upon the plunger bearing against the end of the chambered portion of the momentum head and the shouldered portion of said body, and means for .guiding the momentum head and plunger.

-1 2; In a magazine stapling hammer, a

body having a shouldered portion and a A guideway, a chambered momentum head slidably mounted on saidbody, a reciprocating staple setting plunger connected to said head and provided with a notch in one edge thereof, a bar operating at right angles to said plunger and having a shouldered end coperating with the notch in the plunger to restrict the movement of the plunger in one direction, a spring upon the plunger bearing against the end of the chambered portion of the momentum head and the shouldered portion of said body,`

and a guide member iXed in the wall of the chamber of said momentum head and movable in the said guideway in the body of the device.

In testimony whereof Ihereunto a'liX my signature in presence of two witnesses. 

